code: def print_usage():
      """Prints help"""
      print("Parallel Python Network Server (pp-" + version + ")")
      print(
          "Usage: ppserver [-hdar] [-f format] [-n proto]"
          " [-c config_path] [-i interface] [-b broadcast]"
          " [-p port] [-w nworkers] [-s secret] [-t seconds]"
          " [-k seconds] [-P pid_file]"
      )
      print("")
      print("Options: ")
      print("-h                 : this help message")
      print("-d                 : set log level to debug")
      print("-f format          : log format")
      print("-a                 : enable auto-discovery service")
      print(
          "-r                 : restart worker process after each"
          " task completion"
      )
      print("-n proto           : protocol number for pickle module")
      print("-c path            : path to config file")
      print("-i interface       : interface to listen")
      print(
          "-b broadcast       : broadcast address for auto-discovery service"
      )
      print("-p port            : port to listen")
      print("-w nworkers        : number of workers to start")
      print("-s secret          : secret for authentication")
      print(
          "-t seconds         : timeout to exit if no connections with "
          "clients exist"
      )
      print("-k seconds         : socket timeout in seconds")
      print("-P pid_file        : file to write PID to")
      print("")
      print(
          "To print server stats send %s to its main process (unix only). "
          % STAT_SIGNAL
      )
      print("")
      print(
          "Due to the security concerns always use a non-trivial secret key."
      )
      print(
          "Secret key set by -s switch will override secret key assigned by"
      )
      print("pp_secret variable in .pythonrc.py")
      print("")
      print(
          "Please visit http://www.parallelpython.com for extended up-to-date"
      )
      print("documentation, examples and support forums")
  
imports: import atexit
  import logging
  import errno
  import getopt
  import sys
  import socket
  import threading
  import random
  import string
  import signal
  import time
  import os
  import ppft
  import ppft.auto
  import ppft.common
  import ppft.transport
  import hashlib
label_desc: Use image node_id 2 for calling a global function with example usage: print_usage() without return types